Control Joints in Concrete Wall
Control Joints in Concrete Wall
(OP)
I have designed some concrete retaining walls that I am working on developing a control joint detail. Does anyone know of a product like a zip-strip, but for walls? What other products do you use at a control joint in a wall?
Thanks!
Thanks!






RE: Control Joints in Concrete Wall
Mike McCann
MMC Engineering
RE: Control Joints in Concrete Wall
Dik
RE: Control Joints in Concrete Wall
Arguing with an engineer is like wrestling with a pig in mud. After a while you realize that them like it
RE: Control Joints in Concrete Wall
My only problem with the detail is that the walls could become misaligned at the joint with time without a vertical keyway. Otherwise, to me it is fine.
Mike McCann
MMC Engineering
RE: Control Joints in Concrete Wall
But if it is for a tunnel, building wall or the like, yes.
In otherwords, if you can tolerate the leak, don't put in the specified waterstop. (or clay bentonite panels for that matter - not shown)
Mike McCann
MMC Engineering
RE: Control Joints in Concrete Wall
What's wrong with splicing the reinforcing at the joint and tooling in a notch?
RE: Control Joints in Concrete Wall
Dik
RE: Control Joints in Concrete Wall
I use a (trapezoidal shape) rustication strip (similar to the shapes Greenstreak offers) but normally the contractor elects to cut it from wood). The appearance looks a little more finished plus try to use the same strip at all joints: control, construction and expansion.
If waters weeps thru this joint the bars will rust. If there is the possibility of salt ladden water weeping thru this joint then the bars will corode even faster. This something you might want to consider.
If you want the backside of the wall drained, then provide draintile or weeps thru the wall at the base. If there is finished space on the frontside of the wall, then provide a waterstop in the joint or on the backside. One caution about weeps...if it weeps onto grass OK, but if it weeps onto a walking surface than someone could slip and fall and perhaps you might want to rethink using draintile.
RE: Control Joints in Concrete Wall
Dik
RE: Control Joints in Concrete Wall
If all bars are cut in a control joint then you would have to either rely on aggregate interlock of the cracked concrete surface or add greased dowels at the center of the wall to keep the wall sections aligned.